note that the position is between volcano 274020 Didicas and 274060 Iraya; no depth is provided since position is approximate; http://www.gns.cri.nz/research/marine/kermadec/images/Table2_vent_sites_.pdf, not able to access on 28 May 2015: "submarine eruptions recorded near Batan Island with Didicas- a partially submerged volcano- recently active, together with observations of bubbling vents along a pipeline route offshore Batan, Luzon arc (E.G. Ramos, pers. commun., 2002)"

Year and How Discovered (if active, visual confirmation is listed first):